- How blocks actually propagate - Miners use a mix of pri…

- How blocks actually propagate
- Miners use a mix of private fast relays (e.g., FIBRE-style) and the public P2P network. That public network is mostly non-mining full nodes.
- Gossip is not “serial through all validators.” Each node forwards to its peers in parallel. More nodes don’t put blocks “in series” nor slow the 10-minute cadence; they add alternative paths and redundancy.
- Compact Blocks (BIP152) means most propagation is tiny deltas. The overhead of extra peers is borne by the peers that choose to run them, not by “the network” as a whole.